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                  <p><small><a name="free_file_encryption_software"></a>PeaZip
is a free cross-platform file encryption software / archiver that
provides an unified
portable GUI for many Open Source technologies like 7-Zip, FreeArc,
PAQ, UPX... free alternative to WinRar, WinZip </small><small>and
similar
proprietary software</small><small>.<br>
- Create 7Z, ARC, BZ2, GZ, *PAQ, PEA, QUAD/BALZ, TAR, UPX, WIM, XZ, ZIP
files<br>
- Open and extract ACE, ARJ, CAB, DMG, ISO, LHA,
RAR, UDF, ZIPX files and more,</small><small> over 200 archive types
supported</small><small><br>
Features of PeaZip includes:&nbsp;</small><small>create
encrypted (password protected) archives applying </small><small>AES,
Twofish, Serpent cyphers</small><small>, </small><small>batch creation
and </small><small>extraction </small><small>of archives, </small><small>convert
files, </small><small>create sfx archives, split and join files,
strong encryption with two factor authentication, encrypted password
manager, </small><small>secure deletion, </small><small>hash /
checksum files,
export job definition as script.</small></p>
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            <td colspan="1" rowspan="1" style="vertical-align: top;"> <br>
            <h1 style="text-align: center;"><big><big><big><a
 name="free_encryption_software"></a>Free encryption software, encrypt
7Z ARC PEA ZIP files<br>
            </big></big></big></h1>
            <br>
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                  <td style="vertical-align: top;">
                  <ul>
                    <li>
                      <p><a href="#apply_password">WHAT
IS STRONG FILE ENCRYPTION</a></p>
                    </li>
                    <li>
                      <p><a href="encrypt-files.html#encrypt_file">HOW
TO CREATE ENCRYPTED 7Z ARC PEA ZIP ARCHIVES</a></p>
                    </li>
                  </ul>
                  </td>
                  <td style="vertical-align: top; width: 128px;">
                  <h2><img alt="free file encryption software"
 title="How to apply password, set AES, Twofish, Serpent cyphers"
 src="file-format/security.png" style="width: 96px; height: 96px;"
 align="right"></h2>
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 style="background-color: rgb(255, 255, 255); vertical-align: top;">
            <div style="text-align: left; color: rgb(0, 0, 0);">
            <h2><big><big><big><a name="apply_password"></a><a
 href="encrypt-files.html#free_encryption_software">What is strong file
encryption</a></big></big><br>
            </big></h2>
            </div>
            <br>
PeaZip is a free file archiver especially focused on security, which
supports reading and writing (encryption and decryption) of many strong
encryption standards,
optionally using <span style="font-weight: bold;">two factor
authentication</span> (password and keyfile) for increased security
against means like <span style="font-weight: bold;">social engineering</span>
or <span style="font-weight: bold;">dictionary based attacks </span>(that
can considerably reduce the effort of brute-forcing a textual password
or passphrase).<br>
            <br>
            <h2><img title="Apply password protection to archive files"
 src="password.png" alt="how to encrypt 7Z ARC PEA ZIP files"
 style="border: 0px solid ; width: 562px; height: 302px;"></h2>
            <br>
            <a name="how_to_use_cryptography"></a>Use of end-to-end
cryptography, in which sender and recipient are in
charge of encrypting and decrypting the encoded data, is strongly
recommended
each time sensitive data is sent to (or through) external servers, even
if the
service is advertised implementing cryptography measures.<br>
In example, creating encrypted mail
attachments (and to encrypt uploads to cloud services) preserve
data secrecy against any unauthorized access to user's private
information and data even in case the service is
compromised, either by successful attack, insider breach, or plain
change of policies granting access to unwanted subjects: to <a
 href="extract-encrypted-files.html">open and extract the encrypted file</a>
will always require the encryption password to be known.<br>
            <br>
            <h3><a name="encrypt_rar_zip_files"></a>Cryptographic
protocols supported by PeaZip free encryption utility for writing
(creating password protected archives) are:</h3>
            <ul>
              <li>7Z</li>
              <ul>
                <li>
                  <h3>7-Zip / p7zip
AES256-based encryption</h3>
                </li>
              </ul>
              <li>ZIP</li>
              <ul>
                <li>
                  <h3>WinZip AE (Advanced
Encryption), AES256-based</h3>
                </li>
              </ul>
              <ul>
                <li>ZipCrypto, for
legacy compatibility purpose only as the algorithm is considered weak
under today's standards, not recommended to protect sensitive data<br>
                </li>
              </ul>
              <li>ARC<br>
              </li>
              <ul>
                <li>FreeARC ARC format implementing
encryption scheme that supports AES256, AES contest finalists
Twofish256 and Serpent256 algorithms, and classic Blowfish algorithm</li>
              </ul>
              <li><a href="pea-archiving-utility.html">PEA</a></li>
              <ul>
                <li>PeaZip's native .pea file format,
supporting AES, Serpent and Twofish (128 and 256 bit) EAX-mode
authenticated encryption, enforcing
cryptographically strong data secrecy and verifiable autenticity</li>
              </ul>
              <li>ZPAQ</li>
              <ul>
                <li>ZPAQ AES256-based encryption<br>
                </li>
              </ul>
            </ul>
PeaZip free encryption utility supports (read-only) decryption of ACE,
ZIPX, and RAR archives.<br>
            <br>
Read more about data encryption: <a target="_blank"
 href="http://www.nist.gov/information-technology-portal.cfm">NIST
Information Technology Portal<img
 title="National Institute of Standard and Technologies"
 alt="nist cryptography" src="free-rar/extractor.png"
 style="border: 0px solid ; width: 12px; height: 10px;"></a>, <a
 href="https://eprint.iacr.org/curr/">IACR Cryptology archive<img
 title="International Association for Cryptologic Research"
 alt="iacr cryptology" src="free-rar/extractor.png"
 style="border: 0px solid ; width: 12px; height: 10px;"></a>, Wikipedia
entry for <a target="_blank"
 href="http://en.wikipedia.org/wiki/Encryption">encryption<img
 title="Encryption on Wikipedia" alt="cryptography wiki"
 src="free-rar/extractor.png"
 style="border: 0px solid ; width: 12px; height: 10px;"></a>,
view description of Advanced Encryption Standard finalists: Rijndael/<a
 target="_blank"
 href="http://en.wikipedia.org/wiki/Advanced_Encryption_Standard">AES<img
 title="cryptographers Joan Daemen, Vincent Rijmen"
 alt="wikipedia aes128" src="free-rar/extractor.png"
 style="border: 0px solid ; width: 12px; height: 10px;"></a>, <a
 target="_blank" href="https://www.schneier.com/twofish.html">Twofish<img
 title="cryptographer Bruce Schneier" alt="twofish cipher"
 src="free-rar/extractor.png"
 style="border: 0px solid ; width: 12px; height: 10px;"></a>, and <a
 target="_blank"
 href="http://en.wikipedia.org/wiki/Serpent_%28cipher%29">Serpent<img
 title="cryptographers Ross Anderson, Eli Biham, Lars Knudsen"
 alt="Serpent cipher" src="free-rar/extractor.png"
 style="border: 0px solid ; width: 12px; height: 10px;"></a> ciphers.<br>
            <div style="text-align: left;"> </div>
            <div style="text-align: left;"> </div>
            </td>
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        </tbody>
      </table>
      <table
 style="background-color: rgb(240, 240, 240); width: 960px; text-align: left;"
 border="0" cellpadding="24" cellspacing="0">
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            <td
 style="background-color: rgb(255, 255, 255); vertical-align: top;">
            <h2><big><big><big><a name="encrypt_file"></a></big></big></big><a
 href="encrypt-files.html#free_encryption_software"><big><big><big>How
to create encrypted 7Z ARC PEA ZIP archives</big></big></big><br>
            </a></h2>
            <br>
            <a name="add_password_protection"></a>To password protect
files within archives, chose an archive type
supporting encryption, as ZIP, 7Z, ARC, PEA, and ZPAQ, add files to the
archive being created as explained in the FAQ page, then click on the
padlock icon to
set a <span style="font-weight: bold;">password </span>and optionally
a <span style="font-weight: bold;">keyfile</span> for the archive -
the icon is in the status bar in the file/archive browser, and under
the output file name in the archive creation interface.<br>
            <h2><img title="How to password-protect data"
 alt="how to encrypt files" src="rar-files/cryptography.gif"
 style="width: 16px; height: 16px;" align="middle"></h2>
            <table style="width: 100%; text-align: left;" border="0"
 cellpadding="24" cellspacing="0">
              <tbody>
                <tr>
                  <td style="width: 48px; vertical-align: middle;">
                  <h3><img
 title="Protect content of files with password"
 alt="zip files encryption utility" src="file-format/information.png"
 style="width: 48px; height: 48px;"></h3>
                  </td>
                  <td style="vertical-align: middle;"><a
 name="set_password_to_archive"></a>Please note<span
 style="font-weight: bold;"> the password will be
applied to the objects that will be added to the archive in the current
operation</span> - <span style="background-color: rgb(255, 238, 221);">7Z,
ARC, ZIP, and ZIPX archives support </span><span
 style="font-weight: bold; background-color: rgb(255, 238, 221);">file
level encryption</span><span
 style="background-color: rgb(255, 238, 221);"> (<a
 href="multiple-passwords.html">supports mutiple encryption passwords</a>),
so
each file
in an archive could have, if desired by the archive creator, a
different password</span> - so applying a password to an existing
archive will not affect it (will not apply password protection to
already archived files).</td>
                </tr>
              </tbody>
            </table>
To password-protect an already existing archive you need to extract and
rebuild it, applying the desired password - <a
 href="convert-files.html">archive conversion</a> interface can help
automating the task.<br>
            <table style="width: 100%; text-align: left;" border="0"
 cellpadding="24" cellspacing="0">
              <tbody>
                <tr>
                  <td
 style="vertical-align: top; text-align: right; width: 128px;">
                  <h2><span style="font-weight: bold;"><img
 title="Create random keyfiles" alt="how to use file encryption utility"
 src="file-format/quotes.png" style="width: 32px; height: 32px;"></span></h2>
                  </td>
                  <td style="vertical-align: top; font-style: italic;"><big><a
 name="random_password_generator"></a>PeaZip
provides an integrated utility to <span style="font-weight: bold;">create
random keyfiles and
passwords</span> sampling entropy from the system and from user's
interaction, Crtl+F9 or main applications' menu Tools &gt; Create
random password / keyfile</big><br>
                  </td>
                  <td style="vertical-align: bottom; width: 128px;">
                  <h3><img src="file-format/quotes-inverse.png"
 alt="protect files with encryption password"
 title="Create random encryption password"
 style="width: 32px; height: 32px;"></h3>
                  </td>
                </tr>
              </tbody>
            </table>
            <a name="encryption_password"></a>PeaZip's <span
 style="font-weight: bold;">password manager</span> is
available from main menu, Tools &gt; Password manager.<br>
The password list file is saved in private user's path, allowing each
user to maintain a personal password manager containing different
passwords or passphrases not accessible to other standard users of the
same system.<br>
Optionally, the user can decide to encrypt the password list with a
master password, making the passwor manager private even to
administrative accounts of the same machine, being the data file
unreadable until the correct password is provided.<br>
            <table style="width: 100%; text-align: left;" border="0"
 cellpadding="24" cellspacing="0">
              <tbody>
                <tr>
                  <td
 style="width: 48px; text-align: left; vertical-align: middle;">
                  <h3><img title="How to set password to archives"
 alt="how to create encrypted zip files"
 src="file-format/information.png" style="width: 48px; height: 48px;"></h3>
                  </td>
                  <td style="text-align: left; vertical-align: middle;"><span
 style="background-color: rgb(255, 238, 221);">Some
archive types, like 7Z and ARC, support </span><a
 href="encrypt-filenames.html"><span
 style="font-weight: bold; background-color: rgb(255, 238, 221);">encrypting
files names</span></a><span
 style="background-color: rgb(255, 238, 221);">
of items
added to the archive: in this case it will not even be
possible to see the list of archive's content, file and directory
names </span><span style="background-color: rgb(255, 238, 221);">(in
case the very names expose sensitive information)</span><span
 style="background-color: rgb(255, 238, 221);">, without knowing the
password. This option is available in
Password dialog - PEA and ZPAQ formats will always encrypt name of
files inside
an encrypted archive.</span></td>
                </tr>
              </tbody>
            </table>
            <span style="background-color: rgb(255, 238, 221);"></span><span
 style="background-color: rgb(255, 238, 221);"></span><span
 style="background-color: rgb(255, 238, 221);"></span>
            <div style="text-align: center;">
            <div style="text-align: left;"><a
 name="encrypt_with_key_file"></a>PeaZip free encryption software
supports optional <span style="font-weight: bold;">two factor
authentication</span> for any
write-supported archive format (7Z, ARC, PEA, ZIP) using both a
password (the element you know) and a keyfile (the element you have) to
encrypt the content - it only needs to enter a keyfile in password
dialog when creating the archive.<br>
If a keyfile is set for any
other format than PEA (which has its own way to use keyfile) the SHA256
hash of the file encoded in Base64 (RFC 4648) is prepended to the
password used to build the archive, using standard archive format
encryption mechanism.<br>
This simple password / keyfile combination scheme allows to retain read
compatibility with any other file archiver, even ones not supporting
keyfile parsing (or with different two factor authentication
implementation), simply
passing the Base64-encoded SHA256 hash of the keyfile as the first part
of the password.<br>
            <table style="width: 100%; text-align: left;" border="0"
 cellpadding="24" cellspacing="0">
              <tbody>
                <tr>
                  <td style="width: 48px; vertical-align: middle;">
                  <h3><img title="How to use two factor authentication"
 alt="set file encryption" src="file-format/note.png"
 style="width: 48px; height: 48px;"></h3>
                  </td>
                  <td style="vertical-align: middle;"><span
 style="background-color: rgb(255, 238, 221);"></span> <span
 style="background-color: rgb(255, 238, 221);">KNOWN LIMITATION: two
factor authentication is not available for <a
 href="self-extracting-archives.html">self-extracting archives</a>
(which can be built with 7Z or ARC compression), because usage of
keyfile is not supported by available SFX modules - otherwise resulting
executables would be unable to exctract themselves. When a
self-extracting archive is created, only the password (if provided)
will be used for encrypting it, and only the password will be needed to
extract &amp; decrypt it.<br>
                  </span></td>
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            </div>
            <a name="chose_encryption_algorithm"></a>In "Advanced" tab
of archive creation interface users can chose
encryption method to apply to the archive: by default the recommended
method will be displayed.<br>
            <br>
            <div style="text-align: left;">For
increased security, PeaZip file manager supports <a
 href="secure-delete.html">secure
file deletion</a> to erase tracks of
unwanted data.<br>
            <h3><img title="How to use secure delete function"
 alt="set password protection" src="secure-delete.png"
 style="width: 146px; height: 45px;"></h3>
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            <p> </p>
            <p><a href="peazip-help-faq.html">FAQ</a>
&gt; Security &gt; How to encrypt archive files, use free encryption
software, apply AES, Twofish,
Serpent algorithms</p>
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